[raytasch]

After a few years away from CCs, I find myself in possession of a 17 year old 2554 with 899 hours on the CH23S. The unit has been fairly well maintained with regular oil and filter changes. The crankcase vent system had never been touched. I find that when I mow about half an hour the engine will blow the dipstick and oil comes spewing out. The oil is clean, no indication of gas dilution. The engine runs good, does not smoke, and makes no unusual noises. In my opinion, it appears quite healthy. I currently have the crankcase vent system removed. I find the fiber breather filter clean. The rubber crankcase vent tube to the carb intake was semi-brittle and cracked. The reed valve appears good. Before I replace the gasket and rubber tube and button this thing up, what else should I look at? I just do not see what I've found so far would cause this thing to puke oil. Suggestions for the next step before I button this thing up?